| /* |
| * Copyright Andrey Semashev 2007 - 2015. |
| * Distributed under the Boost Software License, Version 1.0. |
| * (See accompanying file LICENSE_1_0.txt or copy at |
| * http://www.boost.org/LICENSE_1_0.txt) |
| */ |
| /*! |
| * \file bind.hpp |
| * \author Andrey Semashev |
| * \date 30.03.2008 |
| * |
| * This header contains function object adapters. |
| * This is a lightweight alternative to what Boost.Phoenix and Boost.Bind provides. |
| */ |
| |
| #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_ |
| #define BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_ |
| |
| #include <boost/type_traits/remove_cv.hpp> |
| #include <boost/log/detail/config.hpp> |
| #include <boost/log/detail/header.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| namespace boost { |
| |
| BOOST_LOG_OPEN_NAMESPACE |
| |
| namespace aux { |
| |
| template< typename T > |
| struct make_arg_type |
| { |
| typedef T const& type; |
| }; |
| |
| template< typename T > |
| struct make_arg_type< T& > |
| { |
| typedef T& type; |
| }; |
| |
| } // namespace aux |
| |
| //! First argument binder |
| template< typename FunT, typename FirstArgT > |
| struct binder1st : |
| private FunT |
| { |
| typedef typename FunT::result_type result_type; |
| |
| binder1st(FunT const& fun, typename aux::make_arg_type< FirstArgT >::type arg) : FunT(fun), m_arg(arg) {} |
| |
| result_type operator() () const |
| { |
| return FunT::operator()(m_arg); |
| } |
| |
| template< typename T0 > |
| result_type operator() (T0 const& arg0) const |
| { |
| return FunT::operator()(m_arg, arg0); |
| } |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return FunT::operator()(m_arg, arg0, arg1); |
| } |
| |
| private: |
| FirstArgT m_arg; |
| }; |
| |
| //! First argument binder |
| template< typename FunT, typename FirstArgT > |
| struct binder1st< FunT&, FirstArgT > |
| { |
| typedef typename remove_cv< FunT >::type::result_type result_type; |
| |
| binder1st(FunT& fun, typename aux::make_arg_type< FirstArgT >::type arg) : m_fun(fun), m_arg(arg) {} |
| |
| result_type operator() () const |
| { |
| return m_fun(m_arg); |
| } |
| |
| template< typename T0 > |
| result_type operator() (T0 const& arg0) const |
| { |
| return m_fun(m_arg, arg0); |
| } |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return m_fun(m_arg, arg0, arg1); |
| } |
| |
| private: |
| FunT& m_fun; |
| FirstArgT m_arg; |
| }; |
| |
| template< typename FunT, typename FirstArgT > |
| BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT const& arg) |
| { |
| return binder1st< FunT, FirstArgT >(fun, arg); |
| } |
| |
| template< typename FunT, typename FirstArgT > |
| BOOST_FORCEINLINE binder1st< FunT, FirstArgT > bind1st(FunT fun, FirstArgT& arg) |
| { |
| return binder1st< FunT, FirstArgT >(fun, arg); |
| } |
| |
| //! Second argument binder |
| template< typename FunT, typename SecondArgT > |
| struct binder2nd : |
| private FunT |
| { |
| typedef typename FunT::result_type result_type; |
| |
| binder2nd(FunT const& fun, typename aux::make_arg_type< SecondArgT >::type arg) : FunT(fun), m_arg(arg) {} |
| |
| template< typename T > |
| result_type operator() (T const& arg) const |
| { |
| return FunT::operator()(arg, m_arg); |
| } |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return FunT::operator()(arg0, m_arg, arg1); |
| } |
| |
| private: |
| SecondArgT m_arg; |
| }; |
| |
| //! Second argument binder |
| template< typename FunT, typename SecondArgT > |
| struct binder2nd< FunT&, SecondArgT > |
| { |
| typedef typename remove_cv< FunT >::type::result_type result_type; |
| |
| binder2nd(FunT& fun, typename aux::make_arg_type< SecondArgT >::type arg) : m_fun(fun), m_arg(arg) {} |
| |
| template< typename T > |
| result_type operator() (T const& arg) const |
| { |
| return m_fun(arg, m_arg); |
| } |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return m_fun(arg0, m_arg, arg1); |
| } |
| |
| private: |
| FunT& m_fun; |
| SecondArgT m_arg; |
| }; |
| |
| template< typename FunT, typename SecondArgT > |
| BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT const& arg) |
| { |
| return binder2nd< FunT, SecondArgT >(fun, arg); |
| } |
| |
| template< typename FunT, typename SecondArgT > |
| BOOST_FORCEINLINE binder2nd< FunT, SecondArgT > bind2nd(FunT fun, SecondArgT& arg) |
| { |
| return binder2nd< FunT, SecondArgT >(fun, arg); |
| } |
| |
| //! Third argument binder |
| template< typename FunT, typename ThirdArgT > |
| struct binder3rd : |
| private FunT |
| { |
| typedef typename FunT::result_type result_type; |
| |
| binder3rd(FunT const& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : FunT(fun), m_arg(arg) {} |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return FunT::operator()(arg0, arg1, m_arg); |
| } |
| |
| private: |
| ThirdArgT m_arg; |
| }; |
| |
| //! Third argument binder |
| template< typename FunT, typename ThirdArgT > |
| struct binder3rd< FunT&, ThirdArgT > |
| { |
| typedef typename remove_cv< FunT >::type::result_type result_type; |
| |
| binder3rd(FunT& fun, typename aux::make_arg_type< ThirdArgT >::type arg) : m_fun(fun), m_arg(arg) {} |
| |
| template< typename T0, typename T1 > |
| result_type operator() (T0 const& arg0, T1 const& arg1) const |
| { |
| return m_fun(arg0, arg1, m_arg); |
| } |
| |
| private: |
| FunT& m_fun; |
| ThirdArgT m_arg; |
| }; |
| |
| template< typename FunT, typename ThirdArgT > |
| BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT const& arg) |
| { |
| return binder3rd< FunT, ThirdArgT >(fun, arg); |
| } |
| |
| template< typename FunT, typename ThirdArgT > |
| BOOST_FORCEINLINE binder3rd< FunT, ThirdArgT > bind3rd(FunT fun, ThirdArgT& arg) |
| { |
| return binder3rd< FunT, ThirdArgT >(fun, arg); |
| } |
| |
| BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| |
| } // namespace boost |
| |
| #include <boost/log/detail/footer.hpp> |
| |
| #endif // BOOST_LOG_UTILITY_FUNCTIONAL_BIND_HPP_INCLUDED_ |